Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1998-06-12
Physics
Condensed Matter
Strongly Correlated Electrons
Reference added. RevTeX 4 pages incl. 4 ps files
Scientific paper
10.1103/PhysRevLett.81.3195
We study a two-dimensional Fermi liquid with a Fermi surface containing the saddle points $(\pi,0)$ and $(0,\pi)$. Including Cooper and Peierls channel contributions leads to a one-loop renormalization group flow to strong coupling for short range repulsive interactions. In a certain parameter range the characteristics of the fixed point, opening of a spin and charge gap and dominant pairing correlations are similar to those of a 2-leg ladder at half-filling. An increase of the electron density we argue leads to a truncation of the Fermi surface with only 4 disconnected arcs remaining.
Furukawa Nobuo
Rice Maurice T.
Salmhofer Manfred
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